Mobile biogas preparation apparatus

Abstract

A mobile biogas preparation apparatus. An anaerobic fermentation system of the mobile biogas preparation apparatus is integrated in a closed box body, a control system is integrated in a control cabinet, and a leachate recirculation system is an integrated device; the anaerobic fermentation system, the leachate recirculation system and / or the control system are connected to one another by means of pipelines or circuits; and the mobile biogas preparation apparatus comprises at least one anaerobic fermentation system. By means of integrated arrangement of the anaerobic fermentation system, the leachate recirculation system, and the control system, during use, the anaerobic fermentation system, the leachate recirculation system, and the control system can be transported to a designated place by means of a vehicle, and then the systems are connected by means of the pipelines and the circuits.

Description

A mobile biogas preparation device Technical Field

[0001] The present invention relates to the technical field of fermentation devices, and in particular to a movable biogas preparation device. Background Art

[0002] Biogas technology encompasses both production and high-value utilization technologies. Biogas production technologies primarily include wet fermentation and dry fermentation. Wet fermentation is a traditional technology widely used in European biogas projects. Representative processes include the completely mixed anaerobic fermentation process (CSTR) developed by Envitec and MT in Germany. Dry anaerobic fermentation technology has gradually become a major industry development direction in Europe due to its strong adaptability to raw materials, large processing loads, low equipment investment, low process energy consumption, and zero wastewater discharge. Representative processes include the German Bioferm and GICON processes, the French SPI leachate reflux dry anaerobic fermentation technology and VALORGA process, and the Swedish Kompogas process. Dry fermentation in Germany and some other European countries primarily processes municipal organic waste. The French SPI technology can accommodate a variety of materials, including livestock waste, straw, and organic waste, making it more suitable for my country's national conditions and a key technology focus for the domestic biogas industry.

[0003] Research has revealed that while small-scale dry anaerobic fermentation equipment is available internationally, mature industrial products are not yet available in China. Dry fermentation technology and equipment primarily utilizes the Laran or Kompogas processes, often employing horizontal drum-type continuous dry fermentation. Domestically, small-scale anaerobic fermentation equipment primarily consists of wet anaerobic fermentation equipment and household concrete biogas digesters.

[0004] SPI's leachate recirculation dry anaerobic fermentation technology and drum dry process are more advanced than traditional wet processes. Compared to the drum dry process, the garage-type process offers greater convenience, lower cost, more stable operation, and higher gas production rates.

[0005] Although leachate reflux dry anaerobic fermentation has great advantages, the leachate reflux dry anaerobic fermentation technology of the French SPI company is an engineering technology, which is characterized by large-scale and scale. It is applicable to large-scale farms, garbage treatment plants, and agricultural processing waste treatment. It cannot meet the needs of small-scale application scenarios such as small-scale farms, township garbage, farms, reed straw treatment, large supermarkets, and schools.

[0006] Summary of the Invention

[0007] The object of the present invention is to provide a mobile biogas production device that can solve the problems existing in the prior art;

[0008] The present invention provides a movable biogas production device, which includes an anaerobic fermentation system, a filtrate reflux system and a control system;

[0009] The anaerobic fermentation system is integrated in a closed box, the control system is integrated in a control cabinet, and the filtrate reflux system is an integrated device;

[0010] The anaerobic fermentation system, filtrate reflux system and / or control system are connected via pipelines or circuits;

[0011] The movable biogas production device includes at least one anaerobic fermentation system. When there are multiple anaerobic fermentation systems, the multiple anaerobic fermentation systems are arranged in parallel and operate independently.

[0012] Preferably, the anaerobic fermentation system comprises a reaction chamber, a spray head is provided on the top of the reaction chamber; the reaction chamber is a closed box, a sealing door is provided on one side of the closed box;

[0013] An observation window is provided at the lower portion of the sealing door.

[0014] Preferably, the reaction chamber is provided with a spray pipe, a purge pipe, a biogas collection pipe and positive and negative pressure pipes;

[0015] The spray pipe, purge pipe, biogas collection pipe and positive and negative pressure pipes are arranged on the upper part of the reaction chamber;

[0016] The spray pipe is provided with a spray head;

[0017] The spray pipe, purge pipe, biogas collection pipe and positive and negative pressure pipes are connected to the reaction chamber through flanges.

[0018] Preferably, the bottom surface of the reaction chamber is a sloped structure;

[0019] The outlet of the reaction chamber is provided at the lower end of one side of the reaction chamber, and a leachate reflux port is provided. The leachate reflux port is provided corresponding to the lower end of the inclined structure.

[0020] Preferably, a filtering device is provided at a position of the reaction chamber corresponding to the leachate reflux port.

[0021] Preferably, a temperature probe is provided in the middle of the reaction chamber.

[0022] Preferably, the filtrate reflux system comprises a leachate reflux tank, a leachate collection tank and a leachate circulation pump;

[0023] The outlet of the seepage reflux tank is connected to the spray head, and the seepage reflux tank is also connected to a heating device;

[0024] The outlet of the reaction chamber is connected to the inlet of the seepage reflux tank;

[0025] The liquid inlet of the leachate collection tank is communicated with the outlet of the reaction chamber. The leachate collection tank, the leachate reflux tank and the reaction chamber are connected by pipelines, and liquid circulation is carried out by a leachate circulation pump.

[0026] Preferably, the leachate circulation pump is a bidirectional pump, and the bidirectional pump comprises a first pump port and a second pump port;

[0027] The seepage reflux tank is provided with a first reflux tank pipeline and a second reflux tank pipeline;

[0028] The first reflux tank pipeline and the second reflux tank pipeline are both provided with a check valve, and the flow directions of the check valves on the first reflux tank pipeline and the second reflux tank pipeline are different;

[0029] The first end of the first reflux tank pipeline and the first end of the second reflux tank pipeline are connected to the leachate reflux tank, and the second end of the first reflux tank pipeline and the second end of the second reflux tank pipeline are connected to the first pump port of the leachate circulation pump;

[0030] The leachate reflux tank is connected to the leachate circulation pump via a first pipeline, one end of the first pipeline is connected to the second pump port of the leachate circulation pump, and the other end is connected to the first reflux tank pipeline, and the first pipeline is connected to the pipeline between the check valve and the leachate reflux tank, and a first valve is provided on the first pipeline;

[0031] The leachate collection tank is connected to the leachate circulation pump through a second pipeline, one end of the second pipeline is connected to the leachate collection tank, and the other end is connected to the second pump port, and a second valve is provided on the second pipeline;

[0032] The spray head in the reaction chamber is connected to the leachate circulation pump through a third pipeline. One end of the third pipeline is connected to the spray head, and the other end is connected to the second pump port. A third valve is provided on the third pipeline.

[0033] Preferably, the control system is used to monitor the anaerobic reaction in the reaction chamber and control the working state of the filtrate reflux system to achieve the spraying time and spraying temperature of the reflux liquid;

[0034] The dry anaerobic fermentation device further includes a control cabinet, and the control system is arranged in the control cabinet;

[0035] The control cabinet is provided with a biogas membrane, a generator module and a biogas wall-mounted boiler module;

[0036] The air inlet of the biogas membrane is connected to the biogas outlet of the anaerobic fermentation system and the filtrate reflux system;

[0037] The exhaust port of the biogas membrane is connected to the air inlet of the generator module and the biogas wall-mounted boiler module;

[0038] The heat recovery pipeline of the generator module and the hot water pipeline of the biogas wall-mounted boiler module are communicated with the heating device of the seepage reflux tank.

[0039] Preferably, the control cabinet is provided with an exhaust fan. Beneficial effects:

[0040] Through the integrated setting of the anaerobic fermentation system, filtrate reflux system and control system, during use, the anaerobic fermentation system, filtrate reflux system and control system can be transported to a designated location by vehicle, and then the various systems can be connected through pipelines and circuits. There is no need for a large amount of engineering construction, and it has the advantage of easy use and installation. In addition, the integrated system can be miniaturized, which meets the needs of miniaturized application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0042] FIG1 is a schematic structural diagram of a mobile biogas production device provided in a specific embodiment of the present invention;

[0043] FIG2 is a front view of an anaerobic fermentation system provided in a specific embodiment of the present invention;

[0044] Figure 3 is a cross-sectional view taken along the line AA of Figure 2;

[0045] FIG4 is a side view of an anaerobic fermentation system provided in a specific embodiment of the present invention;

[0046] FIG5 is a schematic diagram of the internal structure of an anaerobic fermentation system provided in a specific embodiment of the present invention;

[0047] FIG6 is a schematic structural diagram of the cooperation between the filtrate reflux system and the anaerobic fermentation system provided in a specific embodiment of the present invention;

[0048] FIG7 is a schematic diagram of the structure of a control system provided in a specific embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 1: Anaerobic fermentation system, 2: Filtrate reflux system, 3: Control cabinet;

[0051] 11: reaction chamber, 12: sealing door, 13: observation window, 14: spray pipe, 15: purge pipe, 16: biogas collection pipe, 17: positive and negative pressure pipe, 18: leachate return port, 19: temperature probe;

[0052] 21: sprinkler head, 22: leachate reflux tank, 23: filter device, 24: leachate collection tank, 25: leachate circulation pump, 26: check valve, 27: first valve, 28: second valve, 29: third valve;

[0053] 231: Fence, 232: Filter grate, 241: Air release pipe;

[0054] 31: Biogas membrane, 32: Generator module, 33: Biogas wall-mounted boiler module, 34: Electrical control cabinet, 35: Generator electrical cabinet, 36: Exhaust fan, 37: Air compressor module; 38: Flow meter; 39: Heating pipe module. DETAILED DESCRIPTION

[0055] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0058] As shown in FIG. 1 to FIG. 7 , this embodiment provides a mobile biogas production device, which includes an anaerobic fermentation system 1 , a filtrate reflux system 2 and a control system.

[0059] The anaerobic fermentation system 1 is integrated in a closed box, the control system is integrated in a control cabinet 3, and the filtrate reflux system 2 is an integrated device.

[0060] The anaerobic fermentation system 1, the filtrate reflux system 2 and / or the control system are connected via pipelines or circuits.

[0061] The mobile biogas production device includes at least one anaerobic fermentation system 1. When there are multiple anaerobic fermentation systems 1, the multiple anaerobic fermentation systems 1 are arranged in parallel and operate independently.

[0062] Through the integrated setting of the anaerobic fermentation system 1, the filtrate reflux system 2 and the control system, during use, the anaerobic fermentation system 1, the filtrate reflux system 2 and the control system can be transported to a designated location by vehicle, and then the various systems can be connected through pipelines and circuits. There is no need for a large amount of engineering construction, and it has the advantage of being easy to use and install. In addition, the integrated system can be miniaturized, which meets the needs of miniaturized application scenarios.

[0063] The anaerobic fermentation system 1 includes a reaction chamber 11 , and a spray head 21 is provided on the top of the reaction chamber 11 .

[0064] The filtrate reflux system includes a seepage reflux tank 22 , and an outlet of the seepage reflux tank 22 is connected to the spray head 21 .

[0065] The outlet of the reaction chamber 11 is communicated with the inlet of the permeate reflux tank 22 .

[0066] The control system is used to monitor the anaerobic reaction conditions in the reaction chamber 11 and control the working state of the filtrate reflux system to achieve the spraying time of the reflux liquid.

[0067] In this embodiment, by setting up the filtrate reflux system 2 and under the control of the control system, the biogas slurry with temperature and anaerobic bacteria in the leachate reflux tank can be sprayed onto the material, thereby realizing the anaerobic fermentation process. Compared with the existing drum-type fermentation device, a stirring device is not required in the reaction chamber 11, which simplifies the structure of the fermentation device and reduces the use cost.

[0068] Anaerobic fermentation system 1

[0069] As shown in FIG. 2 to FIG. 6 , the reaction chamber 11 is a sealed box, a sealed door 12 is provided on one side of the sealed box, and an observation window 13 is provided at the lower portion of the sealed door 12 .

[0070] In this embodiment, the sealed box is constructed into a container-like structure, that is, the external structure of the sealed box is similar to that of a container, thereby facilitating the transportation of the anaerobic fermentation system 1. For example, the exterior of the reaction chamber 11 can be a container formed by welding carbon steel.

[0071] The reaction chamber 11 is provided with a spray pipe 14, a purge pipe 15, a biogas collection pipe 16 and a positive and negative pressure pipe 17. The spray pipe 14, the purge pipe 15, the biogas collection pipe 16 and the positive and negative pressure pipe 17 are arranged at the upper part of the reaction chamber 11.

[0072] The spray pipe 14 is provided with a spray head 21. The spray pipe 14, the purge pipe 15, the methane collection pipe 16 and the positive and negative pressure pipes 17 are connected to the reaction chamber 11 through flanges.

[0073] After biogas is generated in the reaction chamber 11, it enters the biogas membrane 31 through the biogas collection pipe 16, where it is then used to generate electricity or be burned for secondary use. The pressure in the reaction chamber 11 is maintained within 10 mbar via the positive and negative pressure pipes 17. If the hydrogen sulfide content in the reaction chamber 11 is too high, oxygen can be added through the purge pipe 15 to achieve biological desulfurization within the chamber.

[0074] When the reaction cycle in the reaction chamber 11 is finished, the valve of the purge pipe 15 is opened, the residual tail gas in the chamber is replaced by a blower, and the sealing door 12 is opened to complete a reaction cycle after the material is discharged.

[0075] All pipelines are connected by flanges, which facilitates disassembly after factory testing and on-site installation, so that the entire reactor is integrated into a product.

[0076] The bottom surface of the reaction chamber 11 is a sloped structure. The outlet of the reaction chamber 11 is a leachate reflux port 18 provided at the lower end of one side of the reaction chamber 11 . The leachate reflux port 18 is provided corresponding to the lower end of the sloped structure.

[0077] Specifically, the reaction bin 11 is installed on the foundation with a 1% inclination. After the raw materials are piled up in the bin, the biogas slurry with temperature and anaerobic bacteria in the seepage reflux tank 23 is sprayed onto the materials through the spray pipe 14. After passing through the materials through gravity filtration, it converges to the bottom plate of the container. Because of the 1% inclination, the material liquid flows back to the leachate reflux port 18 at the tail of the bin body, and then flows into the leachate reflux tank 23, thus completing the material mass transfer and heat transfer process.

[0078] A filter device 23 is installed in the reaction chamber 11 at the location corresponding to the leachate return port 18. Two types of filter devices 23 are installed within the reaction chamber 11: a filter fence and a filter grate. The filter fence supports the material at the rear end, preventing large objects from passing through. The filter grate is used for liquid filtration, ensuring that weeds, straw, and other items that could easily clog the leachate pipe are retained.

[0079] A temperature probe 19 is provided in the middle of the reaction bin 11. The temperature probe 19 is used to monitor the condition of the material in the reaction bin 11.

[0080] It should be noted that the anaerobic fermentation system 1 can also be equipped with a forklift and a mixing agitator, and multiple reaction chambers 11 can be configured during operation.

[0081] The fermentation process of the anaerobic fermentation system 1 is as follows: first, the material enters the mixing agitator via a forklift, and after mixing, the material is transported to the reaction chamber 11 by a forklift. The anaerobic fermentation system 1 includes at least two independently operated reaction chambers 11. Each reaction chamber 11 contains an independent set of anaerobic reaction equipment (such as a spray pipe 14, a purge pipe 15, a biogas collection pipe 16, and positive and negative pressure pipes 17). The multiple reaction chambers 11 are connected in a complementary parallel relationship.

[0082] The stirred material undergoes a biochemical reaction within the enclosed environment of the reaction chamber 11 and under spray conditions, generating biogas. This biogas then enters the biogas membrane 31 through the biogas collection pipe 16. After 30 days of operation, the exhaust gas inside the chamber is evacuated through the purge pipe 15. The sealed door 12 of the reaction chamber 11 is opened, and the biogas residue is removed using a forklift. After rinsing with clean water, the biogas is then transferred to the next gas production cycle. The anaerobic fermentation system 1 maintains a constant temperature of 38°C within the reaction chamber 11, with reflux fluid sprayed regularly. The pressure in the reaction chamber 11 is kept below 10 mbar.

[0083] Filtrate reflux system

[0084] As shown in FIG1 and FIG6 , the filtrate reflux system includes not only a spray head 21 , a filtrate reflux tank 22 , and a filtering device 23 , but also a leachate collection tank 24 and a leachate circulation pump 25 .

[0085] The liquid inlet of the leachate collection tank 24 is connected to the outlet (leachate reflux port 18) of the reaction chamber 11. The leachate collection tank 24, the leachate reflux tank 22 and the reaction chamber 11 are connected by pipelines, and liquid circulation is carried out by the leachate circulation pump 25.

[0086] The spray head 21 and filter device 23 are located within the reaction chamber 11. The filtrate reflux tank 22, leachate collection tank 24, and leachate circulation pump 25, along with the connecting pipes and valves, are integrated. This can be integrated into a single housing or platform. During use, the integrated system is simply placed at the rear of the reaction chamber 11 and connected to the leachate reflux port 18 and spray pipe 14 via piping, offering the advantages of ease of use and installation.

[0087] The leachate circulation pump 25 is a bidirectional pump including a first pump port and a second pump port. The leachate reflux tank 22 is provided with a first reflux tank pipeline and a second reflux tank pipeline.

[0088] Both the first reflux tank pipeline and the second reflux tank pipeline are provided with a check valve 26 , and the flow directions of the check valves 26 on the first reflux tank pipeline and the second reflux tank pipeline are different.

[0089] The first end of the first reflux tank pipeline and the first end of the second reflux tank pipeline are connected to the leachate reflux tank 22 , and the second end of the first reflux tank pipeline and the second end of the second reflux tank pipeline are connected to the first pump port of the leachate circulation pump 25 .

[0090] The leachate reflux tank 22 is connected to the leachate circulation pump 25 through a first pipeline. One end of the first pipeline is connected to the second pump port of the leachate circulation pump 25, and the other end is connected to the first reflux tank pipeline. The first pipeline is connected to the pipeline between the check valve 26 and the leachate reflux tank 22, and a first valve 27 is provided on the first pipeline.

[0091] The leachate collection tank 24 is connected to the leachate circulation pump 25 through a second pipeline. One end of the second pipeline is connected to the leachate collection tank 24, and the other end is connected to the second pump port. A second valve 28 is provided on the second pipeline.

[0092] The spray head 21 in the reaction chamber 11 is connected to the leachate circulation pump 25 through a third pipeline. One end of the third pipeline is connected to the spray head 21 and the other end is connected to the second pump port. A third valve 29 is provided on the third pipeline.

[0093] The leachate reflux tank 22 is provided with a heating device, which can heat the leachate in the leachate reflux tank 22, thereby controlling the temperature of the leachate and further controlling the temperature of the material.

[0094] The leachate collection tank 24 is provided with an air release pipe 241, the inlet end of which is located at the upper end of the leachate collection tank 24. The provision of the air release pipe 241 is an important part of the filtrate reflux system, which ensures smooth reflux of the reflux liquid and reduces the generation of air resistance.

[0095] The working process of the filtrate reflux system is:

[0096] Once the reaction chamber 11 is filled with material, the sealed door 12 is closed. The spray control system is activated, the third valve 29 is opened, and the second and first valves 28 and 27 are closed. A bidirectional spray pump then pumps the liquid from the leachate reflux tank 22 through the spray pipe 3 into the spray head 21, achieving spraying within the garage. The spray liquid then falls to the bottom of the reaction chamber 11 through gravity filtration, where it is first filtered through the first barrier 231, then filtered through the filter grate 232 for a second pass, and then enters the leachate collection tank 24 for a third pass. This triple filtration ensures the spray liquid remains accessible through the pipes, significantly reducing the risk of pipe blockage.

[0097] The bidirectional spray pump realizes the triple functions of a pump through valve switching, effectively reducing investment. At the same time, the pump and pipeline form a pump group skid-mounted integrated device, which only has three devices: the seepage return tank 22, the seepage return tank and the pump group.

[0098] The three functions of the pump assembly are switched by valve switches. Function 1: The seepage liquid enters the seepage reflux tank 22 through the pump assembly, opening the second valve 28, closing the first valve 27, and closing the third valve 29. Function 2: The liquid in the seepage reflux tank 22 circulates automatically, opening the first valve 27, closing the second valve 28, and closing the third valve 29. Function 3: The liquid in the seepage reflux tank 22 enters the reaction chamber 11, opening the third valve 29, closing the second valve 28, and closing the first valve 27.

[0099] In summary

[0100] The leachate, which flows through the reaction chamber 11 at its lowest point, is then returned to the leachate collection tank 24 by gravity filtration. This leachate is then pumped back to the leachate return tank 22 via the leachate return pump 25, and the process repeats. The leachate tank is also enclosed, and the biogas generated within it is incorporated into the biogas membrane.

[0101] Control cabinet 3

[0102] As shown in Figures 1 and 7, the dry anaerobic fermentation device also includes a control cabinet 3. The control system is arranged in the control cabinet 3. The control cabinet 3 also includes a biogas membrane 31, a generator module 32, a biogas wall-mounted boiler module 33, a biogas analyzer, a flow display and an alarm.

[0103] The control cabinet 3 is constructed in a container-like structure, with its interior divided into two areas by carbon steel plates. One area houses the gas storage membrane, while the other houses the control system, generator module 32, biogas boiler module 33, biogas analyzer, flow meter, and alarm. Separating gas storage, gas consumption, and control into separate areas improves the safety of the control cabinet.

[0104] In this embodiment, the control system, biogas membrane 31, generator module 32 and biogas wall-mounted boiler module 33 are integrated into a control cabinet, so that the gas storage, gas use and control are more integrated and convenient for installation and later use.

[0105] The air inlet of the biogas membrane 31 is connected to the biogas outlet of the anaerobic fermentation system 1 and the filtrate reflux system 2 .

[0106] The exhaust port of the biogas membrane 31 is in communication with the air inlets of the generator module 32 and the biogas wall-mounted boiler module 33 .

[0107] The heat recovery pipeline of the generator module 32 and the hot water pipeline of the biogas wall-mounted boiler module 33 are in communication with the heating device of the leachate reflux tank 22 .

[0108] The biogas generated by the dry anaerobic reaction chamber 11 enters the biogas membrane 31 for storage through the biogas pipeline. The biogas membrane 31 and the biogas pipeline are connected by flanges for easy installation and maintenance.

[0109] The biogas pipeline is connected to the biogas membrane 31 through a tee, one end of the tee is connected to the biogas membrane 31, and one end of the tee is connected to the gas utilization part of the control cabinet 3.

[0110] The gas utilization part includes a generator module 32 and a biogas wall-mounted boiler module 33 .

[0111] A flow display device is installed in the biogas pipeline, and the flow display device is a flow meter 38.

[0112] The generator module 32 and the biogas wall-mounted boiler module 33 each have a hot water pipe and a return water pipe connected in parallel to the heating pipe module 39 .

[0113] The heating pipe module 39 is connected to the hot water pipe and the return pipe to the filtrate reflux tank 22, thus forming a heating circulation system. The heating pipe module and the permeate reflux tank exchange heat through a plate heat exchanger.

[0114] The generator module 32 and the biogas wall-mounted boiler module 33 form the biogas utilization system. Biogas entering the gas storage membrane is introduced into the biogas generator or biogas water heater via a biogas blower. The residual heat from combustion is converted into hot water via a heat exchanger and then fed into the heating pipe. This heating pipe is then connected to the heating coil in the leachate tank, heating the leachate to 42°C. The leachate is then temperature-controlled through a filtrate return system consisting of spraying, percolation, and reflux.

[0115] The control system includes an electrical control cabinet 34 and a generator electrical cabinet 35 . The electrical control cabinet 34 and the generator electrical cabinet 35 are the control centers of the container dry anaerobic fermentation system 1 .

[0116] The electrical control cabinet 34 contains the control system and electrical system, controlling the fermentation system's pumps and fans, the opening and closing of pneumatic valves, and the operation of the alarm system. The generator electrical cabinet 35 controls the start and stop of the generator. The generator start and stop signals are based on the gas volume signal from the biogas membrane 31. The generator electrical cabinet 35 also contains the grid connection system.

[0117] The control system is a set of control software and hardware with PLC programming as the core, consisting of an integrated control electrical cabinet, temperature, pressure, liquid level and other sensors and pneumatic valves. The temperature and pressure signals in each reaction chamber 11 are transmitted to the PLC for monitoring the anaerobic reaction situation, and the operation of the leachate reflux pump is controlled by the liquid level gauge height feedback signal. The programming of the control system also has the function of coordinating the spraying, operation stages and operation time of multiple reaction chambers 11. An anaerobic fermentation process is artificially divided into an aerobic stage, a facultative anaerobic stage, an anaerobic stage, a stable stage, an exhaust gas replacement stage and an exit stage. A set of operating procedures is set for each stage. The control system also establishes a set of alarm devices through signal feedback, which is used to analyze and record the operating status of the reaction chamber 11 and for fault diagnosis.

[0118] An exhaust fan 36 and a biogas leakage alarm device are provided in the control cabinet 3 . The exhaust fan 36 is provided on the side wall of the control cabinet 3 , and the biogas leakage alarm device is located above the generator module 32 .

[0119] The exhaust fan 36 and the biogas leakage alarm device are linked together through the control system to realize the leakage alarm exhaust system in the container.

[0120] The valves on the fermentation device are pneumatic valves. An air compressor module 37 is provided in the control cabinet 3, and the air compressor module 37 is connected to the pneumatic valves. The air compressor module 37 is a module that provides power for the pneumatic valves of the control system. All control valves in the field are pneumatic valves.

[0121] In summary, the fermentation device in this embodiment has the following advantages:

[0122] 1. Adopt dry anaerobic technology, with wide adaptability to raw materials, high gas production efficiency and low energy consumption.

[0123] 2. Good gas quality. The methane content is greater than 55%, and the bio-desulfurization technology is used, so the sulfur content of the gas is low.

[0124] 3. Compared with other technologies, this technology does not discharge wastewater, which meets the high environmental requirements of the new district.

[0125] 4. High degree of environmental integration, no tall buildings.

[0126] 5. Stability and reliability: Each fermentation tank operates independently. A single problem will not affect the entire system and can be quickly restored.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mobile biogas production device, characterized in that: Including anaerobic fermentation system, filtrate return system and control system; The anaerobic fermentation system is integrated in a closed box, the control system is integrated in a control cabinet, and the filtrate reflux system is an integrated device; The anaerobic fermentation system, filtrate reflux system and / or control system are connected via pipelines or circuits; The movable biogas production device comprises at least one anaerobic fermentation system. When there are multiple anaerobic fermentation systems, the multiple anaerobic fermentation systems are arranged in parallel and operate independently.

2. The mobile biogas production device according to claim 1, characterized in that: The anaerobic fermentation system comprises a reaction chamber, and a spray head is arranged on the top of the reaction chamber; The reaction chamber is a closed box, and a sealing door is provided on one side of the closed box; An observation window is arranged at the lower part of the sealing door.

3. The mobile biogas production device according to claim 2, characterized in that: The reaction chamber is provided with a spraying pipe, a purge pipe, a biogas collection pipe and positive and negative pressure pipes; The spray pipe, purge pipe, biogas collection pipe and positive and negative pressure pipes are arranged on the upper part of the reaction chamber; The spray pipe is provided with a spray head; The spray pipe, the purge pipe, the biogas collection pipe and the positive and negative pressure pipes are connected to the reaction chamber through flanges.

4. The mobile biogas production device according to claim 2, characterized in that: The bottom surface of the reaction chamber is a slope structure; The outlet of the reaction chamber is arranged at the lower end of one side of the reaction chamber, and a leachate reflux port is arranged corresponding to the lower end of the inclined surface structure.

5. The mobile biogas production device according to claim 4, characterized in that: The reaction chamber is provided with a filtering device at a position corresponding to the reflux port of the leachate.

6. The mobile biogas production device according to claim 2, characterized in that: A temperature probe is arranged in the middle of the reaction chamber.

7. The mobile biogas production device according to claim 4, characterized in that: The filtrate reflux system comprises a leachate reflux tank, a leachate collection tank and a leachate circulation pump; The outlet of the seepage reflux tank is connected to the spray head, and the seepage reflux tank is also connected to a heating device; The outlet of the reaction chamber is connected to the inlet of the seepage reflux tank; The liquid inlet of the leachate collection tank is communicated with the outlet of the reaction chamber, the leachate collection tank, the leachate reflux tank and the reaction chamber are connected by pipelines, and liquid circulation is performed through a leachate circulation pump.

8. The mobile biogas production device according to claim 7, characterized in that: The leachate circulation pump is a bidirectional pump, and the bidirectional pump comprises a first pump port and a second pump port; The seepage reflux tank is provided with a first reflux tank pipeline and a second reflux tank pipeline; The first reflux tank pipeline and the second reflux tank pipeline are both provided with a check valve, and the check valves on the first reflux tank pipeline and the second reflux tank pipeline have different flow directions; The first end of the first reflux tank pipeline and the first end of the second reflux tank pipeline are connected to the leachate reflux tank, and the second end of the first reflux tank pipeline and the second end of the second reflux tank pipeline are connected to the first pump port of the leachate circulation pump; The leachate reflux tank is connected to the leachate circulation pump through a first pipeline, one end of the first pipeline is connected to the second pump port of the leachate circulation pump, and the other end is connected to the first reflux tank pipeline, and the first pipeline is connected to the pipeline between the check valve and the leachate reflux tank, and a first valve is provided on the first pipeline; The leachate collection tank is connected to the leachate circulation pump through a second pipeline, one end of the second pipeline is connected to the leachate collection tank, and the other end is connected to the second pump port, and a There is a second valve; The spray head in the reaction chamber is connected to the leachate circulation pump through a third pipeline. One end of the third pipeline is connected to the spray head, and the other end is connected to the second pump port. A third valve is arranged on the third pipeline.

9. The mobile biogas production device according to claim 1, characterized in that: The control system is used to monitor the anaerobic reaction in the reaction chamber and control the working state of the filtrate reflux system to achieve the spraying time and spraying temperature of the reflux liquid; The control cabinet is provided with a biogas membrane, a generator module and a biogas wall-mounted boiler module; The air inlet of the biogas membrane is connected to the biogas outlet of the anaerobic fermentation system and the filtrate reflux system; The exhaust port of the biogas membrane is connected to the air inlet of the generator module and the biogas wall-mounted boiler module; The heat recovery pipeline of the generator module and the hot water pipeline of the biogas wall-mounted boiler module are connected to the heating device of the seepage reflux tank.

10. The mobile biogas production device according to claim 9, characterized in that: The control cabinet is provided with an exhaust fan.

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